Design of a Dual-Stator Superconducting Permanent Magnet Wind Power Generator With Different Rotor Configuration

The current capacity of superconducting materials is far larger than that of copper. This paper utilizes MgB2 wires as stator armature windings to obtain a higher output power capacity and presents the electromagnetic design of a direct drive dual-stator superconducting permanent magnet (PM) wind power generator of several megawatts. Considering the irreversible demagnetization in PM materials caused by the huge stator current, several new rotor pole configurations are presented. The features of each configuration are discussed, and the finite element method results show that the output power capacity of the proposed generator can be raised by 8% because the stator current can be larger for the generator with new rotor configurations under the restriction of demagnetization.